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A Space Vector Based Zero Common-Mode Voltage Modulation Method for a Modular Multilevel Converter
A Space Vector Based Zero Common-Mode Voltage Modulation Method for a Modular Multilevel Converter
Guozheng Zhang
(School of Electrical Engineering, Tiangong University, Tianjin 300387, China)
Shuo Wang
(School of Electrical Engineering, Tiangong University, Tianjin 300387, China)
Chen Li
(Advanced Electrical Equipment Innovation Center, Zhejiang University, Hangzhou 311107, China)
Xinmin Li
(Advanced Electrical Equipment Innovation Center, Zhejiang University, Hangzhou 311107, China)
Xin Gu
(School of Electrical Engineering, Tiangong University, Tianjin 300387, China)
Journal: World Electric Vehicle Journal
•
• MDPI AG
• ISSN: 2032-6653
Abstract
A modular multilevel converter (MMC) can generate different common-mode voltage (CMV) values due to the high-frequency changing of the switching state under various modulation strategies. The high-frequency dv/dt will produce common-mode current in the equivalent common-mode loop to the ground, which will affect the insulation and shorten the life of the equipment. To eliminate the effect of common-mode voltage on MMC operation, a common-mode voltage elimination strategy (0CMV-SVPWM) is proposed for five-level MMC space vector pulse width modulation (SVPWM) by using the vector that does not generate common-mode voltage as the reference vector in this paper. The proposed strategy is studied and analyzed by the rapid prototype development experimental system based on RT-LAB to verify the feasibility and effectiveness of the proposed strategy.
Guozheng Zhang, Shuo Wang, Chen Li, et al. (2023). "A Space Vector Based Zero Common-Mode Voltage Modulation Method for a Modular Multilevel Converter". World Electric Vehicle Journal. https://doi.org/10.3390/wevj14020053